Lantern-slide-displaying apparatus



P. E. PETHERICK. LANTERN SLIDE DISPLAYING APPARATUS.

7 APPLICATION FILED OCT. II, 1919. 1,354,682.

ZSHEETS-SHEET I.

Patented Oct. 5, 1920.

P. E. PETHERICK. LANTERN SLIDE DISPLAYING APPARATUS.

APPLICATION FILED OCT-11, 1919.

2 SHEETS-SHEET 2.

QQJVMJWW/ Afta n/y Patented Oct. 5, 1920.

UNITED STATES PATENT OFFICE.

PERCIVAL PETHERICK, OF GISBORNE, NEW ZEALAND, ASSIGNOR TO THE PETEERICKPATENT ADVERTISING- SYSTEM LIMITED, 0F AUCKLAND, NEW

ZEALAND.

LANTERN-SL1Bil-DISPLAYING APPARATUS.

Specification of Letters Patent.

Application filed October 11, 1919. Serial No. 330,046.

To alle e/ 100712 25 may concern:

Be it known that I, PERoivAL ERNEST PETIIERTCK, subject of the King ofGreat Britain, residing at Stout street, Gisborne, in the Dominion ofNew Zealand, have in vented a new and useful Improvement inLantern-Slide-Displaying Apparatus; and I do hereby declare thefollowing to be a full, clear, and. exact description of the same.

This invention relates to apparatus for use in displaying lantern slidesof the class in which the slides are adapted to be automaticallydisplayed in regular rotation by the mechansm employed.

The invention is designed specially to provide anew and improved form ofslide car-- rier or magazine in which the slides are vertically disposedone alongside the other and which in its operation is caused to move theslides one by one beneath a slide holder arranged in the projectorapparatus, combined with improved means whereby as each slide comesbeneath such holder, it is raised into the holder and simultaneouslydisplaces the slide already in the holder so that such slide will fallback into its proper division of the carrier.

The invention is illustrated in the accompanying drawings, in which VFigure 1 is a side elevation of the complete apparatus.

Fig. 2, is a plan thereof with certain parts shown broken away toclearly illustrate the parts beneath.

Fig. 3 is a sectional elevation of the slid carrier or magazine.

Fig. 4 is a plan, on an enlarged scale, of the slide carrier and slideholder.

Fig. 5 is a side elevation thereof.

Fig. 6 is a front elevation of the slide holder showing in crosssection, the slide carrier or magazine passing beneath it.

Fig. 7 is a sectional elevation through the slide holder and slidecarrier or magazine.

The carrier, or magazine as it will be hereinafter termed, is thereforeformed as a circular box A having outer and inner vertical walls AAarranged concentrically with one another at an approved distance apart.Each wall isformed with vertical grooves B in it arranged in radiallycoincident lines with those of the other so that the slides C to bedisplayed may be held upright in the box one alongside the other byfitting at their side edges into the respective slide.

radially opposite grooves, as shown clearly in Fig. 4:. The slidesthemselves therefore are held in lines radial to the center of themagazine.

The magazine thus constructed is mounted on a table or support D so thatit may rotate on an axis coincident with its center and cause the slidesto pass beneath the slide holder E that is built upon such table andarranged in a line with approved projector apparatus U also fixed tosuch table.

or convenience in the construction and mounting of the apparatus and theoperating means, the central portion of the magazine bottom is referablyremoved, so that in actual fact, t e magazine is formed as an annularshaped box. It is mounted on an annular slide plate F fixed to the tableD and having guides f'to keep it from moving laterally while allowing itto rotate in the necessary manner. The bottom of the magazine box ispierced with slots G that extend in a line radially coincident with thelines assumed by the slides when in the box, one of such slots beingpositioned beneath each A single slot G is formed in the slide plate Fand the table D, in a line vertically beneath the slide holder E, suchslot being so disposed that the slots G coincide therewith, one by oneas the magazine is given intermittent rotatory motion.

The slide holder is formed by two vertically extending cheeks E and Efixed to the table D and disposed opposite one another on opposite sidesof the annular magazine box A so that the said box thus travels ietweenthem, as clearly shown in Figs. 4 and 6. Each of these checks is formedwith a vertically extending groove 6 in its rela tively inner face, suchgrooves being arranged so that they overlap the respective edges of thebox A and are respectively coincident with the lines of grooves in theinner and'outer walls of such box. Thus a slide 0 positioned in the boxbeneath such grooves 0 may be raised from the box into display positionin the grooves by pushing it up from beneath to the necessary height.

In the working of the apparatus, a slide is designed to be raised intodis lay position in the holder E, the magazine t en to be retatedthrough the proportion of a rotation requisite to bring the next slideinto position beneath the holder, and then after the necessary intervalof time, to raise such H is mountedto rotate horizontally and iscontinuously driven by any suitable means at any desired rate. A lever Jis pivoted to. a standard J fixed beneath'the table and one end of thislever is pivotedto a lifting bar K that extends vertically upward in asuitable guide K" and passes into the slot GJ When this bar isdownitstop is positioned just below the level of the magazine, as shown inFig; 6, so that the magazine mayrotate freely; The :bar is made of sucha shape in cross section that it may pass up into the slot G in the magazine bottom,'at the time beingabove it, and

' engage the bottom .of the corresponding .slide so as to lift suchslide fromthe magazine, up into the slide holder, when it is raised therequired amount by the operation of the lever J. The other end %of thelever is furnished with a roller M extend ing laterally from it andprojecting across beneath. the edge of the wheel H. A cam H of suitableshape is fixed to the wheels bottom surface in a position to engage theroller Mso that on each rotation of the wheel the lever will be operatedto raise the bar K the-requisite amount,rand then V release it so thatit may drop backby its own weight. w

The outer periphery of the-magazine is formed with *ratchet "teeth -Athereon,

spaced apart distances corresponding to the distances apart of theslides in the magazine. Mounted to slide on the table D in a linetangential to the ratchet wheel edge,

,is a block N that carries a spring pawl tooth N positioned to-engagethe ratchet teeth and move the magazine as the block is moved to andfro. -The block is mounted in a guide slot n inthe table and has a.

. portion projecting beneath the table, where wheel rotates this rollerwill engage the end of the leverfmove it across fora distance and thenpass on. The'amount of movement of said lever is adjusted to cause theblock N to be moved the necessary dis from which it was lifted.

tance out to turn the magazine through the precise angular distancenecessary to position the next slide beneath the slide holder, andthismay be effected by mounting the pin which carries the roller h in a slotit formed radially in the wheel and providing for it being locked at anypoint in such slot. A strong spring P is fixed to the back endoftheblock N-and to the table, to return'the block andalso the lever Oto their normal positions after the roller it has released the lever,the pawl N sliding back over the ratchet and engaging behind the nexttooth, ready for the next feeding action. V

Thus each rotation of the wheel B will cause a slide to be raised andthe next slide to be brought into the'position to be raised,

' the slide has passed by their free ends, this position being indicatedin dotted lines in Fig. 7, and then allows the .pawls to fall backontoshoulders e" formed in the sides of the grooves e; The slide then alsodrops down until its bottom rests 'upon these pawls and it is thus heldin the display po- I sition. The back of the slide, near its two edges,is engaged by pressure springs SS fixed upon a spindle S said springsnormally bearing inward and pressing the slide forward to the frontedges of the grooves. These springs are adapted to be turned back as theslide is being raised by connecting the two spindles R and S by thecranks T and connecting rod T. so that the turning of the pawls upwardwill cause the spindle S to be rotated and the springs Sand S. to beturned back. When the pawls fall, the springs will be turned forwardagain, the falling of the pawls being insured by means of the helicalspring t attached to the crank upon the spindle R and to thecheek E, g Vi When the'next slide is raised and engages the pawls, the slide alreadyin position will be tipped'back over the rear of the pawls, the-groovese beingmade wide. enough to permit of such movement, and will slidedown'into the grooves B of the magazine 7 These grooves will have been"fed rearward one step, and will therefore be out of parallel with theslide to be dropped into them. The pawls are therefore so designedfthatthe one at the inner end ofthe-spindle will .throw'the inner edge of'theslide back just a sufficient distance to position such edge above thegroove'in the inner wall of the magazine as shown in Fig. 7, while thatat the outer end of the spindle is made with a tail extension 7 (shownby dotted lines in Fig. 5) so that it will throw the outer edge of theslide across into position to pass into the roove in the outer wall ofthe magazine. onsequently the slide will be accurately positioned todrop back into its proper grooves.

These operations are repeated continuously, the slides being raised todisplay position, one after the other, in the desired order. The machinemay be stopped at any time and restarted at will by controlling themechanism driving the wheel H.

During the changing of the slides in the slide holder, the projectinglight may be automatically shuttered so that no confused pictures willbe thrown onto the screen. This may be effected by the movement of-theslide lifting lever J, which as it rises, allows shutters U (Fig. 1)toclose underthe action of a spring, and as it falls, opens suchshutters, the said lever being connected to the shutters by the cord U Iclaim:

1. In a projection apparatus, the combination of a slide holder; aslidemagazine located beneath the holder and rotatable step by step withrelation thereto; mechanism for raising the slides one at a time fromthe magazine into the holder; and mechanism for rotating the magazineone step to present a new slide to the holder while a slide is beingdisplayed therein.

2. In a projection apparatus, the combination of a slide holder; a slidemagazine located beneath the holder and rotatable step by step withrelation thereto; mechanism for raising the slides one at a time fromthe magazine into the holder; mechanism for rotating the magazine onestep to present a new slide to the holder while a slide is beingdisplayed therein; and means operated by the entrance of the new slideinto the holder to return the previouslydisplayed slide to the magazine.

3. In a projection apparatus, the combination of a slide holder; a slidemagazine located beneath the holder and rotatable step by step withrelation thereto; mechanism r'or raising the slides one at a time fromthe magazine into the holder; mechanism for rotating the magazine onestep to present a new slide to the holder while a slide is beingdisplayed therein; and means engaged by the new slide as it enters theholder for returning the previously-displayed slide to the magazine.

4. In a projectionapparatus, the combination of a slide holder; a slidemagazine located beneath the holder and rotatable step by step withrelation thereto; mechanism for raising the slides one at a time fromthe magazine into the holder; mechanism for rotating the magazine onestep to present a new slide to the holder while a slide is beingdisplayed therein; and pivotally-mounted supporting means carried by theholder for retaining a slide in display position therein, saidsupporting means being operatively engaged by an incoming slide toreturn the previously-displayed slide to the magazine.

5. In a projection apparatus, the combination of a slide holder; a slidemagazine located beneath the holder and rotatable step by step withrelation thereto; mechanism for raising the slides one at a time fromthe magazine into the holder; mechanism for rotating the magazine onestep to present a new slide to the holder while a slide is beingdisplayed therein; and means operated automatically during the entranceof the new slide into the holder for ejecting the previously-displayedslide and returning it to the magazine.

6. In a projection apparatus, the combi nation of a slide holder; aslide magazine for presenting the slides one at a time to the holder;operating mechanism for the magazine; mechanism for. transferring theslides from the magazine to; the holder; an operating wheel; anoperating rod for oneot said mechanisms mounted for vertical rockingmovement; an operating rod for the other mechanism mounted forhorizontal rocking movement, said rods terminating at their free endsadjacent opposite sides of said wheel; and devices on opposite sides ofsaid wheel for actuating said rods.

7. In a projection apparatus, the combination of a slide holder adaptedto support the slides one at a time in stationary display positiontherein; a slide magazine; means for transferring the slides from themagazine to the holder; and means for moving the magazine with relationto the holder while a slide is in its stationary display position insaid holder to bring a new slide to transferring position.

8. In a projection apparatus, the combination of a slide holder; arotatable, circular slide magazine provided with a peripheral series ofteeth; mechanism for transferring the slides one at a time from themagazine to the holder; and mechanism cooperative with-said teeth forimparting a step-by-step rotary movement to the magazine to bring theslides successively into position to be acted on by the transfermechanism, said rotating mechanism being timed to operate while a slideis in display position in the holder.

9. In a projection apparatus, the combination of a slide holder; acircular slide magazine rotatable about a central axis and provided withradially-disposed slide containersg mechanism for imparting av step- Iand mechanism for simultaneously introducing a new slide into the holderand returning the one already therein to its particular container in themagazine. v p

10. In a projection apparatus, the combination of a slide holder; acircular slide magazine rotatable about a central axis and provided withradially-disposed slide containers; mechanism for imparting astep-bystep rotary movement to the magazine to present the slides one ata time to the holder, said mechanism being timed to act while a slide isin display position in the magazine; and mechanism for simultaneouslyintroducing a new slide into the holder and returning the onealreadytherein to its particular container in the magazine. r

'11. In lantern slide display apparatus, the combination with a slidemagazine of circular form constructed to hold thc slides one behind theother in radial lines and with.

means for imparting intermittent partial rotation to such magazine in a,horizontal plane and-upon a central axis and means for raising theslidesone by one vertically upward from the'niagazine in alternationwith the partial rotary movements of themagazine, ofa slide holder fixedabove the magazine and positioned so that the slides therein passbeneath it in the rotation of the magazine,such slide holder beingformedwith grooves to receive the side'edges of a the bottom edge of theslide will rest and being also formed with cam faces on their backs'todirect the slide down across the 'back and into" the magazine ontheirnext upward turning movement, substantially as speclfied.

12. In lantern slide display apparatus, the

' combination with a slide holder constructed as described in claim 11,of a second spindle mounted parallel to the pawl spindle and connectedwith it so as to be turnedthere by, such second. spindle having pressuresprings secured thereon adapted to be turned into engagement with theslide in the holder when the pawls are down and to be turned out ofengagement as the pawls are lifted, and a 'sp'ringcontrolling suchconnections and normally keeping the pawls down, substantially as andfor the urposes specified.

In testimony whereof li have signed this specification in the presenceof two subscribing witnesses.

PERGIVAL ERNEST PETHERICK.

' Witnesses:

' J. A. DUNCAN,

GORDON E. Mosns.

